Injector.



INJEGTOR.

(Application tiled Dec. 5, 1900.)

(Model.)

No. a3,9|4. Paiemed om. a, 190|,

J. nEsMnnn.

INJECTUB.

y (Application filed Deo. 5, 1900.) (Nudel.) 4 Sheets-Sheet. 2.

No. 683,9l4.

(Model.)

J. DESMUND. INJECTOR.

(Application filed Dec. 5, l 900.)

Patented 0st. 8, 190|.

4 Sheets-Sheet 3.

f No. 683,9l4.

.K Patented Oct. 8, |90I. J. DEsMoNn.

IN J E CT D R.

(Application filed Dec. 5, 1900.)

4 Sheets-Sheet 4.

(Model.)

, l \A M//f //W ww Mw R N .lI I l .u NrlwNllll UNITED STATES PATENT OFFICE.

JOHN DESMON'D, OF CINCINNATI', OHIO, ASSIGNOR TO THE LIINKENHEIMER COMPANY, OF SAME PLACE.

SEECILFICCAELEON forming part of Letters Patent No. 683,914, dated October 8, 1901.

f Application filed December 5, 1900. Serial No. 38,836. (Model.)

To @ZZ whom it may concern: 4, Sheet 2, is an enlarged central section, in

Be it known that I, JOHN DEsMoND, a citiside elevation, of the lifting-tube and assozen of the United States, residing at Cincinciat-ed parts. Fig. 5, Sheet 2, is a sectional nati, in the county of `Hamilton and State of end elevation of the same on the dotted line 5 Ohio, have invented certain new and useful y y of Fig. 4 looking to the right. Fig. 6,

Improvements in Injectors, of which the fol- Sheet 2, is an enlarged central section, in side lowing is a full, clear, and exact description, elevation, of the overflow-valve seat. Fig. 7, reference being had to the accompanying Sheet 2, is an end elevation of Fig. 6 looking drawings, Aforming part of this specification. to the left. Fig. 8, Sheet 2, is an end eleva- 6o 1o My invention relates to injectors in which tion of the overliow-valv-e, looking to the right successive impulses of a plurality of steamof Fig. 9. Fig. 9, Sheet 2, is a central secjets force the water into the boiler and in tional side elevation of the overflow-valve. which the filial overflow is positively closed, Fig. 10, Sheet 2, is an enlarged central secsuitable means being used for the opening tional side elevation, partly broken, of the 15 and closing of the overflow simultaneously main steam-inlet valve and associated parts. with the closing and opening of the valve Fig. 11, Sheet 3, is an enlarged broken side which admits the operating-steam into the in elevation of the forward part of the injector, jector. Y showing the lever-operating mechanismfor My present injector in its general constructhe steaminlet and overflow valves. Fig. 12, 7o zo tion and mode of operation is very similar to Sheet 3, is an end elevation of Fig. 11 looking that of my prior patent, No. 636,499, of Noto the right. Fig. 13, Sheet 3, is a broken secvember 7, 1899, of which it may be said to beV tional detail elevation of the removable stop an improvement; and, like that injector, one mechanism closed. Fig. 14, Sheet 3, is a corobject of my present invention is to construct responding View with the stop open. Fig. 15, 25 the injector in such a manner that its feeding Sheet 3, is a reversed view of the stop. Fig. capacity can be readily adjusted to the re- 16, Sheet 3, is a view corresponding to Figs. quired duties of either stationary or locomo- 13 and 14 with the stop removed. Fig. 17, tive engines. Sheet 3, is an enlarged detail side elevation l Another object is to so construct the feedof the stop-bearing. Fig. 1S, Sheet3, is a 8o 3o ing mechanism that the feeding of the injeccorresponding view, partly in section. Fig. tor will not raise the temperature of the fed-v 19, Sheet 4, is an enlarged axial section of the in water to such a degree as to deposit scale delivering-tube. within the tubes of the injector, by which its The same letters of reference are used to use would be impaired, and the final object indicate identical parts in all the figures. 35 is to produce an injector of a simplified and Ais the shell creasing of the injector,which cheapened mode of construction and at the at a, a', and 0,2 is provided with the usual same time increase its reliability and etlithreaded necks for the steam, inlet-water, t ciency of action. and boiler delivery connections. At the'end All of these objects are obtained by the the shell A opposite the delivery 'end a2 is an 9o 4o mechanism illustrated in the accompanying interiorly-threaded opening concentric with drawings and hereinafter to be more fully de- .the opening CL2, into which is screwed a cap or scribed, and the novelty of my invention will bonnet B, provided with astufting-box bi The be specifically pointed out in the claims. steam-inlet ct opens into a chamber C, formed y In the accompanying drawings, Figure 1, by the outer shell A and an inner diaphragm 45 .Sheet l, is a longitudinal axial section, in side c, and the latter has a threaded aperture, into elevation, of an injector embodying my inwhich is screwed a cap or bonnet B, projectvention. Fig. 2, Sheet 2, is an enlarged cening toward the bonnet B, and into the oppo-r tral section, in side elevation, of the deliverysite end of which is screwed a nozzle E, provalve and its supporting-cage on the dotted jecting into the water-chamber F, that com- 10c 5o line ai of Fig. 3. Fig. 3, Sheet 2, is an end municates with the water-inlet ct', and. by the elevation of Fig. 2 looking to the left. Fig. passage of the steam through which the iniand the nozzle E are in axial alinement, andV in this instance in alinement with the axes of the outlet d2 and stuffing-box h. Between the diaphragms CZ and e is the overflow-chamber I, and in the diaphragm e is seated a checkvalve f, opening into the delivery-chamber from whence the overflow passes through a valve-controlled opening g and passage K to an outlet h, leading to the atmosphere.

L is the check-valve interposed betweenthe discharge ends of the deliverystube H and the outlet d2, to be closed atproper times by the back pressure of the boiler. 'lhis valve, with its attachments and mode of connection io the injector-casing, constitutes one of the features of my present invention and will be more fully described hereinafter.

The cap or bonnet B has its apertured end within the steam-chamber C formed Vinto a valve-seat ffl, (see Fig. 10,) against which closes a tubular valve M, whose tubular stem extends rearwardly through the stuffing-box l), thence through a head or collar] on a sleeve N, having its bearing and sliding upon a tubular support O, supported by a bracket P, depending from the casing A and carrying at its outer end an upturned bracket Q.

The stem of the valve M is threaded at its outer end and is locked to the lugj by a shoulder on one side thereof and by a nut k on the opposite side, and it has upon its extreme rear end a stuffing-box Z. A haud-lever R has a fork straddling the sleeve N, which is pivoted thereto on both sides, as at m. (See Figs. l and l1.) The lower ends of the fork of the lever on each side of the sleeve N are provided with forwardly-extending pivoted links fn, whose forward ends are pivoted, as at o, to the bracket Pin such manner that the vibration of the lever R will cause the longitudinal movement of the valve M to open and close the same, as will be readily understood. In addition to this function of openingu and closing the valve M the lever R also closes and opens the valve S, which controls the opening g in the overflow-chamber K by mea-ns of a stem p passing through a tubular bearing q in the chamber F, thence through a taper nut 'r at the forward end of the tubular bearing, which takes the place of a stuiing-box, and thence forward into a bore in the tubular support O. The tubular support O has slots s through it on opposite sides, through which and having their bearings in the sliding sleeve N two pins tf are passed, the formerbearing against the forward end ofthe stern p and serving as a 4push-pin to open the valve S, and the latter passing through said stem and serving as a pull-pin to withdraw the stein when it is desired to have the valve S closed by the pressure back of its disk, as will be explained more fully hereinafter The slots s are sufticiently elongated to permit the fullest movement of the lever R in both directions.

Extending axially through the nozzle E and the tube G is the forcingtube T, the discharge end of which, slightly tapered exteriorly, partially enters the inlet end of the tube H. Said tube is again beveled and enlarged exteriorly just in rear of the discharge-nozu zle of the tube and has its bearing in a tubular extension u of said nozzle. Between the said tubular extension and the threaded end of the nozzle E are a series of perforations U, Figs. l and 10, surrounding the tube u. The rear end of the forcing-tube T is closed, but is provided with a series oflongitudinal slots w, Figs. l and 10, opening into the rear end of the tube. Upon the rear end of the tube wT, within a recess in the valve M, is an eX- tension h2, having a slot cut down into it, into which is slipped the T-headed end of a rod or stem U, which passes rearwardly through a bore in the stem of the valve F and has its rearend threaded and engaging with a thread; ed aperture in the bracket Q, and a handL wheel or crank-handle V, fast on the rear end of the stem, serves to turn the same to cause the longitudinal movement of the tube T.

In addition to the check-valve f I provide a ring check-valve g', Fig. 4, which fits snugly upon and is free to slide on the discharge end of the tube G. The rear side of this ringvalve is flanged outwardly to form a seat against the forward end of the threaded bear ing g3, by which the tube G is screwed and securely held in the diaphragm CZ. Through this threaded portion g3 and extending from one side of the diaphragm cZ to its opposite side are a series of perforations or ports g4, Figs. et and 5, adapted to be opened and closed by the forward and backward sliding of the ring-valve g', as hereinafter explained. The ring-valve g has sufficient play upon the tube G and is held from disconnection therefrom by a ring g2 or other suitable stop Secured upon the forward end of the tube G, as seen in Fig. 4.

The construction of the check-valve Land its connection to the injector-casingis as follows, reference being had to Figs. l, 2, and 3: The discharge end Z8 oi' the injector-casing, of brass and in this instance brazed to the casing, which is of iron, is exteriorly threaded to reccivea union-nut Z9, which holds on the union coupling Z, and between them :is clamped the anged end Z7 of a tubular cage Z', which fits within the discharge end of the injector-casing, as seen in Fig. l. The rear end of the cage Z is interiorly threaded to receive a threaded ring-seat Z2, which is screwed therein and against which the check-valveL seats. The valve L has on its forward side a tubular stem Z5, engaging a guide-pin Z4, over which it loosely fits, and Which guide-pin is IOO IIO

carried by a spider-arm Z3, forming part of or carried by the cage Z. Vent perforations Z6 through the stem Z5 permit the free play of the valve and stem on the guide-pin Z4. By this construction the cage Z can at any time be easily removed from the injector-casing to substitute a new valve or valve-seat or to cleanse or regrind the same, as occasion may require.

By reference to Figs. l, 6, '7, 8, and 9 the construction and mode of operation ot' the overliow-valve will be readily understood from the following description: The valvedisk S5 is carried upon a tubular stem s4, guided upon a pin 87, projecting from a capnut screwed into an aperture in the injectorcasing in rear of the valve. In front of the valvedisk 35 is a smaller flanged disk s6, through which are a series of openings S2, opening into a slot or cavity S3 between the valve-disk S5 and the anged disk 3"'. When the valve S is closed, the outer edge of the disk is seated against a rin g-seat S,screwed into an aperture in the diaphragm which separates the chamber A from the chamber K, and this ring-seat is provided with lugs s', Figs. 6 and 7, by means of which itis screwed into place bya spanner or othersuitable tool through the aperture containing the cap-nut, before mentioned, which guides the stem of the valve F. The forward end of the stemp lits loosely into an aperture in the disk s, and the purpose of the cavity or slot s3 and apertures s2 is to cause a circulation of the Water across the seating-surface of the disk .S5 when the valve is partially opened, which effectually cleanses out any sediment or scale which might otherwise adhere to the disk 55, and therebypreventits proper closing. Upon opening the valve M to admit steam to the injector by drawing back the hand-lever R the sleeve N and stem 79 are at the same time. drawn back away from the valve S, which as the pressure in the chamber J increases behind it forces the valve to its closed position. The reverse movement of the lever R in closing the valve M through the medium of the stem p presses forward and opens the valve S, as will be readily understood.

Referring now to Fig. 10, the construction of the valve M will be readily understood from the following description: The valve M is tubular,with bores of three different diametersthe rearmost to receive the coupling extension b2 of the tube T, the middle one to receive the rear end of the tube itself, and the forward one to receive the end of the tubular extension u, which projects to some distance in rear of the seat 1l upon the cap or bonnet D. The exterior of the valve is threaded and rabbeted or cut away on its forward face to receive first an elastic ring m2, of rubber, cemposit-ion containing rubber, or other suitable elastic material, over which is fitted a metal ring fmwhich forms the valve proper and engages with the seat i when the valve is closed. .An interiorly-tlueaded flan ged ring or collar m, screwed upon the threaded end of the valve, serves to hold the rings m2 m3 in place, as will be readily understood. By this construction I insure a perfect and tight iit at.

capes from the nozzle E, around the tube T,

into vthe lifting-tube Gr, thereby creating a vacuum in the chamber F, which will canse `the water from the source of supply to enter said chamber through opening d. The water so raised will pass through the tube G and be driven into the chamber I- and partly through the tube H into the chamber J until the pressure in the chamber I is sufficient to raise the valve f, whereupon the water in the chamber I, joining that in the chamber J, will pass through the opening g and escape through chamber K into the atmosphere. The further movement of the lever R in opening the valve M will gradually permit the valve S to be forced toward a closing position until such time as the ends of the ports w in the forcing-tube T are uncovered, whereupon steam Will enter through said ports into the tube T and will impart a second impulse to the water passing through the tube H sufticient to form an equilibrium between chambers I and J which will cause valve j'to drop to its seat, thereby closing communication between the two chambers. Valve S being still open all the water is passed through tube H to the atmosphere through opening g. As the back movement of lever R still gives more steam through ports w, the velocity of the water through jet H is increased sufficiently to resist boiler-pressure. At about that time or a little later valve S begins to close, gradually bringing pressure in chamber J up to boilerpressure, and at that point valve L immediately opens, allowing free access to the boiler for all the water, and just at this moment the valve S will be closed, the overflow will be stopped, and the increasing velocity of the water through the tube H by the further uncovering of the ports yw will be sufficient to overcome the boiler-pressure and open the valve L to permit the Water to pass from the injector into the boiler. As soon as the pressure in chamber J rises above that in the chamber I the check-valve f is closed and all of the water that passes through the tube G has to pass through the 'tube H. Should a vacuum be formed in the chamber I, the ringvalve g will at once be open'to admit water from the chamber F into the chamber I, and thereby restore equilibrium. As soon as the injector is thus started the tube T by means of the crank-handle V can be moved forward longitudinally to regulate the amount of IOO IIO

steam passin g from nozzle E around the tube T, and by cutting ott this supply of steam or throttling the nozzle E the steam is lmade to pass almost entirely through the tube T, and the entering water through the tube G will not be heated to an extent sufficient to deposit scale in the tubes of the injector, as fully described in my prior patent, before referred to.

Another feature of my invention, illustrated in Figs. 1, 13, 1-i, 15, 1G, 17, and 18, consists in applying a pivoted removable stop IV between the bearing Q of the bracket Q, and the hub of the crank-handle V. This Stop is so disposed that when in place it will not interfere with the advancement of the tube T to its farthest limit under the requirements of the working of the injector; but when it is lifted out of the way the tube T can be advanced farther into the mouth of the tube H, so as to almost, if not quite, throttle the saine. This adjustment is found desirable whenever thc injector is stopped from its work of feeding water to the boiler, for then upon opening the valve M steam would pass through the oriiices h and out from the nozzle E, and thence down through chamber F and pipe c, whence it would pass back to the supply tank or reservoir to heat its contents. Whenever it is desired to start the injector again, the tube T will be withdrawn and the stop W be turned down to its normal condition. The stop W is pivoted, as at Q, to a bored lug on the bearing Q', the bore of which lug contains a pin Q3, to which the stop is secured and around which pin in the bore is a coiled spring q, tending to hold the stop close against the bearing and to hold a pin q2, Fig. 15, on the inner side of the stop in one or the other of two depressions q', Fig. 16, in the bearing. This pin and these depressions serve to hold the stop either in its closed position, as shown in Fig. 13, or in its open position, as seen in Fig. 14:.

Referring now to Figs. 1 and 19, I would thus describe the novel features of the combining and delivery tube II. This tube, as is common in most injectors, is contracted at or near its middle, its bore being tapering and enlarging from the middle each way. It has been found in practice that just beyond the contracted part of the bore the tube became disintegrated either from wear or excessive heat, my theory being that the water in its rapid passage through the tube and being compressed at the contracted throat and then relieved just as it passed that point develops an amount of heat sufficient to corrode or disintegrate the metal of the tube at that point, thereby requiring in time the replacement of au entire new tube. I overcome this difficulty by making the tube in two parts h h2, Fig. 19, the former being the receiving end and the latter the discharge or delivery end, the two parts being screwed together, as seen at 71.3, and a counterbore being formed in the delivery end of the portion 7L to receive a ring 7L", of steel or other suitable metal of a high resistance to the disintegrating action before referred to. The interior bore of this ring conforms to the vbore of the tube, and, as shown, it is located just at or slightly beyond the contracted part of the tube, and it is held in place by a shoulder h5 on the inner end of the portion 71.2 of the tube. I have found from experience that a ring of this character so introduced into the tube at this point will last very much longer than if the tube were a homogeneous one, and it has the further advantage that in case of disintegration of the ring 7L the tube can be readily uncoupled and a new ring substituted for the worn one at small expense and with little loss of time.

Having thus fully described my invention, I claim- 1. In an injector,of the character described, the combination of the inlet water-chamber, the adjacent overflow-chamber, a passage between said chambers around the lifting-tube, and a valve within the overflow-chamber carried on said lifting-tube for opening and closing the passage around the lifting-tube and between the two chambers, substantially as described.

2. In an injector of the character described, the combination of the inlet water-chamber, the adjacent overflow-chamber, a lifting-tube opening from the water chamber into the overiiow-chamber, a series of circnlarly-arranged ports around said lifting-tube and between said chambers, and a ring valve within the overflow-chamber carried on said lifting-tube for opening and closing said ports around the lifting-tube, substantially as described.

3. In an injector of the character described, the combination of the inlet water-chamber, a lifting-tube therein, a steam-chamber with a nozzle therefrom for the lifting-tube, a valveseat within the steam-chamber controlling the opening into said nozzle, and a valve for said valve-seat provided with a self-adjusting yielding surface to tightly fit the valve-seat, substantially as described.

4. In an injector of the character described, the combination of the inlet Water-chamber, a lifting-tube therein, a steam-chamber with a nozzle therefrom for the lifting tube, a valve-seat within the steam-chamber controlling the opening in said nozzle, and a valve for said valve-seat provided on its closing-face with a recessed yielding ring covered by a metal ring which contacts with the valveseat to form itself-adjusting tight-closing surface, substantially as described.

5. In an injector of the character described, the combination of the delivery-chamber, outletchamber communicating therewith by means of an opening provided with a valveseat, a valve for said valve-seat within the delivery-chamber composed-of a guided disk forming the valve proper, a second disk carried by the rst disk adapted to enter thc IIO opening between the two chambers with a cavity between said disks, a series of perforations through the second disk opening into said cavity, and an operating-stem for said Valve to open the same When moved in one direction and to permit the self-closing of the valve when moved inthe opposite direction, and whereby said cavity and perforations form an automatic cleansing means for the valve-disk and its scat, substantially as described. Y

6. In an injector, the combining and delivery tube having acontracted bore at or near its middle provided with a non-disintegrating bearing-surface at or near its contracted portion on the delivery side thereof.

7. In an injector of the character described, the combining and delivery tube having a contracted bore at or near its middle and made in two parts united at the contracted portions, and a renewable non-disintegrating ring inserted. in the bore at or near its contractedV portion on the delivery side thereof, substantially,A as described.

8. In an injector, the combination with the discharge end thereof of a cage Z telescopically fitted therein and provided with a Iianged end Z7, a check-Valve L fitted and guided in said cage, a removable valve-seat Z2 screwed into the end of the cage, and a couplingunion for clamping the flange of the cage to hold the latter in place, substantially as described. f

9. In aninjector of the character described, the combination of the valve M and its operating-stem, the sleeve N fast to said stem and guided on a projection from the injectorcasing, the forked hand-lever R connected by means of pivoted links n to the injectorcasing and pivoted to the sleeve N, the overfioW-valve S, the stem p therefor, and the push-and-pull pins t t/ connecting the sleeve N and the stem p, substantially as described.

10. In an inj ectorof the character described, the combination of a forcing-tube having a defined limited play for the ordinary operations of the injector, an operating-stemtherefor, and a removable stop for said stem constantly in an engaging position for the same` under the ordinary operations of the injector, said stop being adapted to bethrown out of engagement with the stem When desired to permit the movement of the forcing-tube to an abnormal position, substantially as described. I

11. In aninjector, the combination with the operating-stem U, bearing-bracket Q therefor, operating-handle R, and pivoted stop W pivoted to the bearing-bracket Q, substantially as and for the purpose specified.

12. In an injector, the combination of the operating-stein U, bearing-bracket- Q therefor, operating-handle V, pivoted stop W piv-V oted` to vthe bearing-bracket Q and yieldingly held thereto by a spring-pressed pin, a pin q2 on the stop W and depressions q in the face of the bearing for holding the stop locked in its open or closed position, substan- JoHN DEsMoND.

Witnesses:

OWEN N. KINNEY, G. G. HAMPsoN. 

